Circuit board



FIG. 1 is a perspective view of a circuit board showing my new design;

FIG. 2 is a top plan view of the assembly of FIG. 2

FIG. 3 is a front elevational view of the assembly of FIG. 2;

FIG. 4 is a right side elevational view of the assembly of FIG. 2;

FIG. 5 is a left side elevational view of the assembly of FIG. 2;

FIG. 6 is a rear elevational view of the assembly of FIG. 2; and,

FIG. 7 is a bottom plan view of the assembly of FIG. 2.

The broken lines shown in all figures are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a circuit board, as shown and described. 